1 #pragma ident "%Z%%M% %I% %E% SMI"
2
3 /*
4 * The contents of this file are subject to the Netscape Public
5 * License Version 1.1 (the "License"); you may not use this file
6 * except in compliance with the License. You may obtain a copy of
7 * the License at http://www.mozilla.org/NPL/
8 *
9 * Software distributed under the License is distributed on an "AS
10 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
11 * implied. See the License for the specific language governing
12 * rights and limitations under the License.
13 *
14 * The Original Code is Mozilla Communicator client code, released
15 * March 31, 1998.
16 *
17 * The Initial Developer of the Original Code is Netscape
18 * Communications Corporation. Portions created by Netscape are
19 * Copyright (C) 1998-1999 Netscape Communications Corporation. All
20 * Rights Reserved.
21 *
22 * Contributor(s):
23 */
24
25 /*
26 * LIBLDAP unescape.c -- LDAP URL un-escape routines
27 * We also tolerate URLs that look like: <ldapurl> and <URL:ldapurl>
28 */
29
30 #include "ldap-int.h"
31
32
33 static int unhex( char c );
34
35
36 void
nsldapi_hex_unescape(char * s)37 nsldapi_hex_unescape( char *s )
38 {
39 /*
40 * Remove URL hex escapes from s... done in place. The basic concept for
41 * this routine is borrowed from the WWW library HTUnEscape() routine.
42 */
43 char *p;
44
45 for ( p = s; *s != '\0'; ++s ) {
46 if ( *s == '%' ) {
47 if ( *++s != '\0' ) {
48 *p = unhex( *s ) << 4;
49 }
50 if ( *++s != '\0' ) {
51 *p++ += unhex( *s );
52 }
53 } else {
54 *p++ = *s;
55 }
56 }
57
58 *p = '\0';
59 }
60
61
62 static int
unhex(char c)63 unhex( char c )
64 {
65 return( c >= '0' && c <= '9' ? c - '0'
66 : c >= 'A' && c <= 'F' ? c - 'A' + 10
67 : c - 'a' + 10 );
68 }
69